ntfy lets you send push notifications to your phone or desktop via scripts from any computer. E.g. to notify you when scripts fail, or long-running commands complete.

https://docs.ntfy.sh/install/

wget -c https://github.com/binwiederhier/ntfy/releases/download/v2.11.0/ntfy_2.11.0_linux_amd64.deb
sudo dpkg -i ntfy_*.deb
sudo systemctl enable ntfy
sudo systemctl start ntfy